Is this Labour’s election slogan?

I wouldn't be surprised if this Gordon Brown snippet gets deployed ad nauseam between now and the next election:

“

"[Brown] described Labour as the party of 'prosperity not austerity'"

If so, it's worth noting that it's a phrase that Ed Miliband used in several speeches last year (e.g. here, here and here). But, whoever its author, it's hard to imagine it working for a governing party which has presided over one of the most spectacular busts in our history.